OEM Carrier 40VA Control Transformer 120V-24V for Model PG8MAA060090ACJA

This OEM control transformer (part number HT01BC116, updated successor HT680054) is the factory-specified step-down transformer for the Carrier PG8MAA060090ACJA gas furnace. The transformer converts 120V line voltage down to 24V AC, powering the entire low-voltage control circuit — thermostat, gas valve, inducer relay, and control board. When it fails, nothing in the system responds: no call-for-heat, no blower command, and no ignition attempt. A blown transformer is often caused by a shorted low-voltage wire or a failed downstream component, so always check the 24V circuit before installing the replacement.

• Specs: 40VA rating | 120V AC primary | 24V AC secondary | 60 Hz | Foot-mount configuration | Wire-lead connections with insulated female connectors
• OEM vs Generic: This is a factory-matched OEM transformer built to Carrier's exact VA and voltage tolerances. Generic transformers frequently mount incorrectly without modification and may run at edge tolerances, risking premature failure of the control board or gas valve.
• Install difficulty: 2/5 — Shut off power at the breaker and verify with a multimeter before touching any wiring. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Tip: always check for a low-voltage short before energizing the new transformer.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse — order before 3PM local time.

Compatibility: Direct OEM replacement for Carrier model PG8MAA060090ACJA gas furnace. Also replaces legacy part numbers HT01BC116B, HT01BC115, HT01BB126, HT01BC120, and HT01CT120. Verify your unit's data plate shows a 40VA 120V/24V transformer before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — in stock and ships today.